A company is developing a security policy for secure communication. In the exchange of critical messages between a headquarters office and a branch office, a hash value should only be recalculated with a predetermined code, thus ensuring the validity of data source. Which aspect of secure communications is addressed?
- data integrity
- non-repudiation
- origin authentication
- data confidentiality
Explanation: Secure communications consists of four elements:
- Data confidentiality – guarantees that only authorized users can read the message
- Data integrity – guarantees that the message was not altered
- Origin authentication – guarantees that the message is not a forgery and does actually come from whom it states
- Data nonrepudiation – guarantees that the sender cannot repudiate, or refute, the validity of a message sent
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